66166707 has 8 divisors (see below), whose sum is σ = 89132176. Its totient is φ = 43656192.

The previous prime is 66166691. The next prime is 66166729. The reversal of 66166707 is 70766166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66166707 - 2⁴ = 66166691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66166747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113398 + ... + 113979.

It is an arithmetic number, because the mean of its divisors is an integer number (11141522).

Almost surely, 2^66166707 is an apocalyptic number.

66166707 is a deficient number, since it is larger than the sum of its proper divisors (22965469).

66166707 is a wasteful number, since it uses less digits than its factorization.

66166707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227477.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 66166707 is about 8134.2920404913. The cubic root of 66166707 is about 404.4639700256.

The spelling of 66166707 in words is "sixty-six million, one hundred sixty-six thousand, seven hundred seven".